MDJNR External Turning Tool Holder

MDJNR/L CNC Lathe Tool Holder Key Benefits:

High Rigidity: The tool holder design offers excellent rigidity
Compatibility: It is compatible with a wide range of carbide inserts
Quick Changeover: The MDJNR/L facilitates quick tool changes
Durability: Made from premium materials, this tool holder is built to last
Cost-Effective: It is designed to minimize tool costs by reducing the frequency of replacement and maintenance.
Reduce Vibration: The tool holder design helps minimize vibration
Easy Maintenance: The MDJNR/L is easy to maintain, ensuring it stays in top condition for a long time.

These features make the MDJNR/L an excellent choice for precision machining in CNC lathe operations.

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Product Details

About the product

The MDJNL CNC lathe turning tool holder is a robust and versatile tool designed for efficient external turning operations. It features a clamp and

locking pin mechanism that securely holds the insert, ensuring stability during high-speed cutting. This tool holder is compatible with DNMG style

inserts and is suitable for a wide range of materials, from steel to cast iron. It offers easy indexability, reducing downtime and increasing productivity.

The MDJNL is known for its durability, precision, and ability to deliver a fine surface finish on machined parts

Overview

The MDJNL (and MDJNR/L variant) CNC lathe turning tool holder is engineered for precision and efficiency in external turning operations. Combining robust construction, advanced clamping technology, and user-centric design, it stands out as a reliable solution for high-performance CNC machining, balancing durability, productivity, and cost-effectiveness.

Application	CNC tool holder	Model Name	External Turning Tool Holder
Material	Alloy steel	Model Number	MDJNR/L
For insert	DNMG	Brand	IRON ROOT
Use	Turning, Profiling	Origin	Mainland China
Color	Black	Material	40CrMo-42CrMo
Features	anti-corrosion,long life,cost-effective

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Material & Construction

Base Material: Crafted from premium alloy steel (typically 40Cr or 42CrMo), selected for its high tensile strength and impact resistance.
Heat Treatment: Undergoes precision heat treatment to achieve a hardness of 38–42 HRC, ensuring structural rigidity and resistance to deformation under high cutting forces.
Surface Protection: Coated with anti-rust finish or black oxide treatment to resist corrosion, extending service life in coolant-rich or humid workshop environments.

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2. Secure Insert Clamping

Equipped with a precision-machined clamp and locking pin mechanism that securely retains inserts:

Minimizes insert runout to ≤0.01mm, critical for maintaining tight tolerances (±0.02mm).
Prevents insert slippage during high-speed or intermittent cutting, reducing edge chipping and tool wear.

3. Broad Compatibility

Insert Compatibility: Optimized for DNMG-style carbide inserts, supporting common sizes such as DNMG 432 (IC 12.7mm), DNMG 543 (IC 15.875mm), and DNMG 654 (IC 19.05mm) with nose radii ranging from 0.4mm to 1.2mm.
Material Versatility: Suitable for machining a wide range of workpieces, including carbon steel, alloy steel, cast iron (gray/ductile), and stainless steel (with proper coolant application).

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4. Quick Changeover & Indexability

Designed for rapid tool and insert replacement:

Intuitive clamping system allows operators to index or swap inserts in seconds, reducing downtime by 20–30% compared to traditional tool holders.
No specialized tools required for maintenance, streamlining workflow in high-volume production.

5. Vibration Reduction

The rigid shank design and optimized weight distribution dampen vibration during cutting, which:

Improves surface finish quality by reducing chatter marks.
Extends insert life by minimizing cyclic stress on the cutting edge.

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6. Durability & Longevity

Premium Materials: High-strength alloy steel and corrosion-resistant coatings ensure a service life of 10,000+ operating hours with proper maintenance.
Wear-Resistant Components: Clamping pins and contact surfaces are hardened to resist wear, maintaining clamping precision over time.

7. Cost-Effectiveness

Reduces tooling costs by minimizing insert breakage (via secure clamping) and extending tool holder lifespan.
Eliminates frequent replacements, lowering long-term operational expenses.

8. Easy Maintenance

Simple disassembly for cleaning insert pockets and coolant channels, preventing chip buildup that could affect precision.
No complex components; routine inspections (e.g., checking clamp tightness) are straightforward, ensuring consistent performance.

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Compatible Machines & Applications

CNC Lathes: Compatible with leading models such as Fanuc 0i-TF, Siemens Sinumerik 828D, Haas ST-series, Doosan Puma, and Mazak Quick Turn.
Slant-Bed Lathes: Ideal for high-rigidity slant-bed designs, maximizing stability in heavy-duty external turning.
Applications: Specialized for external turning operations including facing, profiling, shoulder turning, and semi-finishing/roughing of steel, cast iron, and stainless steel components.

Summary

The MDJNL (MDJNR/L) tool holder combines high rigidity, secure clamping, and user-friendly design to deliver precision and productivity in CNC lathe operations. Its ability to reduce vibration, support quick changeovers, and withstand heavy use makes it an cost-effective choice for precision machining across industries such as automotive, aerospace, and general engineering.

About Our Company

Jinan Xinxin Trading Co., Ltd. is a company specializing in a full range of turning tools, milling tools, holemaking tools, carbide cutting tools, machine tool accessories and
other products. At the same time, we accept non-standard product customization and provide perfect tooling solutions for the machining and manufacturing industry.
After years of development, our company firmly believe in the concept of integrity-based, with high-quality service so that the company's products are exported to
Europe, the Middle East, South America, Southeast Asia throughout the world's more than 40 industrialized countries and regions, won the majority of domestic
and foreign customers to support and trust.

Jinan Xinxin Trading Co., Ltd. was founded in 2012, is an excellent comprehensive imported CNC cutting tools agents in Shandong, the company firmly believe in
the concept of good faith, with high quality and attentive service. The company believes in the concept of good faith, with high quality and attentive service. For
the various machining enterprises to supply the world's famous brands of imported CNC cutting tools, machining center tools.

Company Brands
Our company brand IRONROOT series products, with excellent quality and perfect service, strive to reduce the cost of using tools for you.

Main products
Our company, as an important link in the machining field, is following and driving its whole system to run. Our distribution of products has become increasingly systematized, mainly including: Sandvik Coromant sandvikcoromant, Seco, Walter, Kennametal Group Kennametal, Mitsubishi MITSUBISHI, Sumitomo Sumitomo, Kyocera Sholette Kyocera CERATIP, Toshiba, Daijie, Hitachi Tools HITACHI TOOL, ISCAR ISCAR, German cobalt collar Guehring, TEGUTEC TAEGUTEC, KORLOY KORLOY and so on.
Domestic brands: Zhuzhou Diamond Brand, Zigong Great Wall Brand, Zhuzhou Jingcheng Brand, Chengdu Yingge, Ha Yigong, Harbin Tool Factory, Southwest Tools, Chengqi Tools, Shaanxi Cemented Carbide, Zhuzhou Cemented Carbide, Guizhou Yihai, Shanghai Tool Factory and a series of domestic and foreign well-known brands of manufacturers of various types and specifications of CNC blades, Metal lathe tools CNC cutting tools, whole tools, machine-clamped blades, welded blades, toolposts, shank, holder, tungsten steel slats, bars. Tungsten steel slats and bars.
At present, our company's product range includes turning tools, milling tools, drilling tools, tooling systems, carbide cutting tools, machine tool accessories and so on.

Our Customer Reviews
Our products are exported to various countries,milling insert including the United States, the United Kingdom, Spain, Italy, Belgium, France, Germany, etc., and are deeply loved and supported by users in these countries.
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